In two to three weeks, it will be clear how effective Covishield vaccine is against COVID-19 variant Omicron, Adar Poonawalla, the chief of Serum Institute of India which manufactures the Indian version of the Oxford-AstraZeneca vaccine, told a news channel on Monday.
In an interview to NDTV, Poonawala said that Omicron-specific booster shots are possible and added that the focus of the government must remain to get everyone double vaccinated.